327 bottom ends? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-20-2011, 11:25 PM
MAKE EM STICK AND E.T'S QUICK
 
Join Date: Jan 2011
Location: Bradenton fl.
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
327 bottom ends?

im building a 327 casting number 3914660 i know this was an impala motor and all the 327s came with dif heads and intakes. but i cant seem to dig up if they all had the same bottom end? mines a lg journal 2 bolt main which i like so when i rebuild the bottom i can splay the caps. but im trying to find out what compression it was stock and what it will be with my 462 casting 2.02 heads? but cant seem to find this info anywhere online. andyou guys always have thr RIGHT answers.thanks. from what i understand the 327s differed in cams intakes and heads but know nothing of the bottom ends it has 4 valve relief pistons if that helps.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-21-2011, 03:52 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
A SBC 327 w/64 cc chambers and FT pistons w/a 0.040" quench will be a little above 9.5:1 CR.

There were 327's w/large journal (aka “LJ”) forged cranks, but they're few and far between. '68 was the only year for this, IIRC. '67-back were forged SJ cranks.

327 engines could be LJ (cast or forged) or small journal (forged only), the SJ rods had 11/32" bolts, the LJ rods had 3/8" bolts. Rods earlier than about '64 had "spit holes".

Large journal blocks could be 2- or 4-bolt mains. 327's were 2-bolt. Only 302, 350 and 400 blocks could be 4-bolt (but not all were).
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-21-2011, 04:53 AM
MAKE EM STICK AND E.T'S QUICK
 
Join Date: Jan 2011
Location: Bradenton fl.
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cobalt327
A SBC 327 w/64 cc chambers and FT pistons w/a 0.040" quench will be a little above 9.5:1 CR.

There were 327's w/large journal (aka “LJ”) forged cranks, but they're few and far between. '68 was the only year for this, IIRC. '67-back were forged SJ cranks.

327 engines could be LJ (cast or forged) or small journal (forged only), the SJ rods had 11/32" bolts, the LJ rods had 3/8" bolts. Rods earlier than about '64 had "spit holes".

Large journal blocks could be 2- or 4-bolt mains. 327's were 2-bolt. Only 302, 350 and 400 blocks could be 4-bolt (but not all were).
thanks i belive i have the forged crank. also with no threads for bolt in crank snout. iv been installing dual idler timing gears tonight and have to grind down the cam button and axle of the power idler to clear my timing cover. any suggestions for not taking to much off?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-21-2011, 04:54 AM
MAKE EM STICK AND E.T'S QUICK
 
Join Date: Jan 2011
Location: Bradenton fl.
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks i belive i have the forged crank. also with no threads for bolt in crank snout. iv been installing dual idler timing gears tonight and have to grind down the cam button and axle of the power idler to clear my timing cover. any suggestions for not taking to much off?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-21-2011, 06:52 AM
CosmikDebris's Avatar
Registered User
 

Last journal entry: 1974 S&W
Last photo:
Join Date: Feb 2010
Location: NJ
Age: 53
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Are you using a stock cover? If so why not go to a after market cover to avoid grinding on the gear set. I have a extra Eddy cover, I can measure the depth if that will help.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-21-2011, 09:13 AM
1971BB427's Avatar
Registered User
 

Last journal entry: Latest changes
Last photo:
Join Date: Dec 2010
Location: Portland
Posts: 2,124
Wiki Edits: 0

Thanks: 20
Thanked 381 Times in 337 Posts
Maybe mt 327 is a fluke, but it's from a 1967 Chevelle SS and it's large journal forged crank.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-21-2011, 01:27 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,059
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
Must be a fluke because the only large journal that came in 67 was the 350 used in a Camaro.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-21-2011, 11:37 PM
MAKE EM STICK AND E.T'S QUICK
 
Join Date: Jan 2011
Location: Bradenton fl.
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by CosmikDebris
Are you using a stock cover? If so why not go to a after market cover to avoid grinding on the gear set. I have a extra Eddy cover, I can measure the depth if that will help.
that would be helpfull but either way the faces of all 4 gears need to be flush with each other. and when they are flush the power idler axle touches the block and needs a min of .005" clearance. and my cover seems to be a stock replacement chrome chevrolet cover, also the cam button touches the timing cover slightly
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-21-2011, 11:50 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Quote:
Originally Posted by crankshaft3rd
thanks i belive i have the forged crank. also with no threads for bolt in crank snout. iv been installing dual idler timing gears tonight and have to grind down the cam button and axle of the power idler to clear my timing cover. any suggestions for not taking to much off?
You can tell a forged crank from a cast crank easily by the width of the parting line. See image below.

I'm going to go out on a limb and say I do not think GM made a 327 LJ crank w/o the threaded damper bolt hole. I do not know this for a fact, however I did own a LJ cast crank '68 327 that was w/o the threaded hole.

I always suggest a gear drive not be used. Instead, use a quality double roller timing set and be done w/all the monkey motion of that gear drive and the installation of it.


OEM CAST CRANK (thin parting line)


OEM FORGED CRANK (wide parting line)


OEM Cast on Left, Forged Aftermarket on Right

Last edited by cobalt327; 01-21-2011 at 11:56 PM.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-22-2011, 01:28 AM
MAKE EM STICK AND E.T'S QUICK
 
Join Date: Jan 2011
Location: Bradenton fl.
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i hear that alot hhonestly. about the chain instead of gears. but the way i see it the gears are stronger and i really enjoy the whine of the tightly meshed gears. and another big factor is i am on a limited budget and the noisey gears were a gift from my wife so they most def. will be used. i love her now that i think about it. lol
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-22-2011, 05:26 AM
CosmikDebris's Avatar
Registered User
 

Last journal entry: 1974 S&W
Last photo:
Join Date: Feb 2010
Location: NJ
Age: 53
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by crankshaft3rd
that would be helpfull but either way the faces of all 4 gears need to be flush with each other. and when they are flush the power idler axle touches the block and needs a min of .005" clearance. and my cover seems to be a stock replacement chrome chevrolet cover, also the cam button touches the timing cover slightly

Looks like grinding or milling is the solution also I don't think the stock cover will hold up to the cam button w/o reinforcement. I will post the measurement of the eddy cover today

http://static.summitracing.com/globa.../sum-g6700.pdf
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-22-2011, 10:54 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Quote:
Originally Posted by crankshaft3rd
... the noisey gears were a gift from my wife so they most def. will be used. i love her now that i think about it. lol
You need say no more! More power to you both.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 bottom end JohnyR17 Engine 4 10-30-2006 11:38 AM
What bottom end to use NovaSS350 Engine 0 06-13-2004 03:50 PM
bottom end astrops Transmission - Rearend 1 05-24-2004 04:57 PM
What is bottom end? Rubberman2003 Engine 3 07-13-2003 02:33 PM
want more bottom end mr.chevelle Engine 14 07-12-2003 09:59 PM


All times are GMT -6. The time now is 06:00 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.